Bbake-opebatino mechanism



June 3, 1 930. w, co s Reg. 17,687

BRAKE OPERATING MECHANISM Uriginal Filed July 13. 1926 INVENTOR CHARLESM (Oil/IVS BYM HIS ATTORNEY Reissued June 3, 1930 CHARLES W. CQLLINS, FSEATTLE, WASHINGTON BRAKEOPERATING QIECHANISM Original No. 1,837,440,dated August 2,-1927, Serial No. 122,064, filed July 13, I926.Application for reissue filed March 14, 1929.

My invention relates to brakes, and is particularly applicable to brakesfor automotive vehicle's, its broad object being to provide meanswhereby a large portion of the retarding or braking force required isderived from the movement to be retarded.

An object of my invention is to provide a brake actuatin mechanism whoseaction is independent 0 the direction of rotation of m the, brakedwheel.

, Another object of my invention is to provide a brake actuatingmechanism in which the parts which are subject to mechanical injury arehoused within and protected by the brake drum.

Still another object of my invention is to provide a brake operatingmechanism actuable by a small physical effort on the part of an operatorto produce a relatively great re tarding force.

My invention possesses other objects and valuable features, some ofwhich will be set forth in the following description of my inventionwhich is illustrated in the drawings 5 forming part of thespecification. It is to be understood that I do not limit myself to theshowing made by the said description and drawings, as I may adoptvarying forms of my invention within the scope of the claims.

My invention does not consist in the brake mechanism proper, but ratherto the means em loyed by which the brake mechanism, WhlCh latter may beof any standard and suitable construction, is applied. It consistsessentially of afriction clutch mechanism mounted within the brake drum,and having the two friction surfaces, one upon the wheel itself and theother upon a member mounted to oscillate about the axis of the wheel,movable by operator-controlled mechanism to bring the twosurfaces incontact. It consists of certain combinations of parts, which will behereinafter particularly defined in the claims.

5 In the accompanying drawings I have shown my invention embodied in theform of construction which I now prefer to use when applying myinvention to a certain type of car brake.

Figure 1 shows in plan view the left rear lar type of brake, I utilize aportion of the Serial No. 347,148.

is one employinga brake drum 1 mounted on the inner face of a wheel, anda brake band 10 engageable therewith and mounted upon the chassis of thevehicle. This is a standard type of construction. It maybe added thatthe principle of my invention may also be ap lied to other kinds ofbrakes.

n applying my invention to this particu:

inner surface of the disk 11, which carries the friction surface or rim1 of the drum. Mounted withinthe recess or chamber formed by I saidbrake drum, is a ring 2, which ring has an inwardly extending flange20carry ng a renewable friction ring 21 adapted to be brought intofrictional contact with the inner face of the disk 11. Y

The ring 2 is carried upon a frame which, as illustrated, is in the formof a spider consisting of a central hub 23 and arms 24. This is mountedso that it may turn about the axis of the wheel shaft, and also so thatit may be reciprocated axially thereof a limited distance. The hub 23 isprovided with a pcripheral groove in which is mounted a ring comprisingslide members 25, which are provided with pivot hubs at twodiametrically opposite points, with which engage the oke arms 30 of anoperating lever 3, which ever is pivoted at 31 upon any suitable orconvenient portion of the chassis, or other member fixedly carried uponthe chassis.

It is evident that by the oscillation of lever 3, the spider and theoscillating friction member carried thereon, may be forced against thefriction surface of the disk 11, thereby producing a turning tendency inthe movable friction member 20. This oscillable member has a link, as 4,pivoted thereto as at 40, 100

tion with a crank arm carried b I preferably in a position which, in thenormal relation-of parts, is aligned with the link 4; that is, thelink 4in neutral position is aligned with a radius extending from the pivot 40to the rear axle of the car. It is capable of being swung. in eitherdirection from the neutral position. It therefore makes no differencewhich way the wheel moves, the brake would be applied if the frictionclutch members just described are in contact. 4

The link 4 extends forwardly to a connecthe usual transverse brake shaft41, and this transmits the movement through links as 42 to the usual orany suitable brake operating arm 43. The particular construction of thislatter mechanism is not an essential part of my invention. My inventionis designed for use in connection with various kinds of brake applyingmechanisms. v I

The operating lever 3 has a link or rod 32 connected therewith, andextending forwardly to a connection with the service brake lever '34, oris connected in any suitable way with any lever from which it is desiredto operate it. g

The operation of my device is evident. When it is desired to apply thebrake the usual method of operating a lever is employed. This lever,represented by the lever 34, transmits the effort through link 32'to thelever 3, and this moves the hub of the spider carrying one of thefriction clutch members so as to engage it with the other member, whichlatter member is mounted upon and turns with the car wheel. This by theoscillation of the hub and its spider, exerts a pull through link 4, andthis oscillates the usual transverse brake shaft 41. The springs 44which are ordinarily employed in connection with the standard brakemechanism to secure their normal disengagement, may be relied upon tofree the two members of the friction clutch device. An additional sprinor springs may be applied if this is foun necessary or desirable.

With a device of this character, the effort required by the driverto'a-pply the brake is very slight. The chief power used in applying thebrakes is derived from the rotating wheel. The particular constructionillustrated and above described is given merely toillustrate theprinciples of my invention and one preferred manner of carr ing out thesame. It is evident that many 0 the details may be changed withoutaffecting the character of the invention. One of the features which Idesire to cover, is the manner of obtaining the power throughfriction'clutch devices mounted in the brake drum.

To prevent the chamber enclosed by the brake drum from becoming filledwith dirt, I provide a disk 5 which may be carried by the hub of thewheel, and which is of such diameturned thereby, r

. hub and the parts carried thereby tar as to fit snugly inside the arms24 of the spider. The ring 2, which carries one of the friction members,also carries a ring which extends across the annular slot existinbetween the outer ed e of the disk 5, an the inner surface of t e brakedrum 1. This maintains a closure sufiicientl tight'to pre-- vent anymaterial amount 0 dirt entering this chamber.

What I claim as my invention is:

.1. In'a brake operating mechanism for automobiles, having a brake drumsecured upon L its groove and manually operable means for operating Saidlever to engage the friction surfaces of the clutch device.

, 2. The combination with a vehicle brake of the type employing a drumsecured upon the vehicle wheel and a brake acting upon said drum, of ahub concentric with the wheel axle inwardly of the brake drum, said hubbeing freely turnable about said axle and movable toward and from thedrum, arms carried by said hub and extending within the brake drum, 'afriction ring carried by the said arms and adapted. to engage-the innerside face of the brake drum to be frictionally a brake engageable withthe brake drum, ake appl 'n means including a rod connecting sai hu andarms, and manually operable means for axially .moving said friction ringand its connected parts to engage it with and disengage it from thebrake drum to thereby turn said ring and operate the brake.

3. The combination with a vehicle brake of the type employing a drumsecured to and at the inner face of a'wheel and a brake engageable withsaid drum, of a hub mounted inwardly of and concentric with the drum,said hub being turnable about-and movable lengthwise of the axis of thedrum, arms carried b the .hub and extending into the drum, a rictionring carried by said arms and engageable with the'inner face of the drumto be thereby turned, a disk having openings for said arms andserving asa closure for the inward face of the drum, brake applying meansoperatively connected with the said arms to be actuated by the turninthereof, and means for manually moving sai to apply and release thefriction members.

4. In a brake operating mechanism for automobiles having a brake drumsecured upon the wheel, a friction clutch device having one v frictionmember carried by and within said drum, the complemental member beinlocated within the drum and manually a ustable for limited turning aboutthe drum axis and to be engaged with and disenga ed from the frictionsurface of the drum, a 'sk fixed relatively to. the drum and closing theinner face ening of the drum except for a cirm cular s at, and a ringcarried by the manually movable one of the friction c utch members andservin to close said slot.

5. In a rake operating mechanism for vehicles having a brake drumsecured upon a wheel and a brake actingholn saiddrum, the combinationwith said m of a friction clutch device having a friction member'carriedby and within said drum a complemental friction member mounted withinthe drum to oscillate about the wheel axis, a link ivotally connectedwith said oscillable memr and operatively connected with the brakeaplplying mechanism, a hub slidable along the w eel axis and connectedwith said oscillable member, and o rator-controlled means for slidingsaid hu to engage the friction surfaces of the clutch device.

6. The combination with a vehicle brake of the ty employin a drumsecured upon the who e wheel an a brake acting u n said drum, of a hubconcentric with the w eel axle inwardly of the brake drum, said hubbeing freely turnable about said axle and movable toward and from thedrum, a mem-' a bet carried by said hub and extendin within said drum, afriction ring carried y said member and adapted to en 7 ge the innersurface of the drum to be frictionally turned thereb a brakeengageablelwith the." brake a. o drum, rake applyin means includi a linkconnecting with sai hub, and manna I up erable means for axially movingsaid friction rin and its connected parts to engage it with I andisengage it from the brake drum to thereby tu said ring and operate thebrake. In testim ny whereof, I have hereunto set my hand this 2nd da ofMarch, 1929.

. CHABiES W. COLLINS.

